I think he said the opposite.
Read his statement carefully. I read it several times. It's a bit convoluted, but I think he says that anti-Semitism is growing in the U.S., and that it exists in the protest movement.
It’s right there in black and white. I merely pointed out that what he actually said was the complete opposite of what he may have been trying to say. He actually said “of course” to doubting it.